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HVDC underwater connectionof Crete to Greece mainland

A few weeks ago the contracts were signed for this connection, from Crete, to Attica, 2 underwater cables, length 500 km, 500 kV, HVDC.It goes without saying that the inhabitants of the Damasta village, don't want the conversion station being built in their village ("not in my backyard").Not to consider the repercussions both in economy and in stability for Greece and Crete, 3 power stations using mainly mazut, almost 1,000,000 tons of heavy fuel annually, not to mention the pollution.The "small"cable, 2X180 km, 150 kV three phase, from Crete to Peloponnissos, is going to be energized later this fall. 200 MW.The "large" one-800 MW.The small one-the longest AC underwater link globally, also the large one. When both of them are energized, the savings willl be in the range of 100,000,000 euros annually for the state utility clients all over Greece-all greeks are paying so we Cretans don't have more expensive electricity.

Reply to
Dimitris Tzortzakakis
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HVDC? That must involve some huge inverters but I guess the capacitive losses you avoid make up for it. Sounds like a very interesting project. I would think a passive conversion plant would be preferable to three bunker oil plants but I guess it depends on who's yard it is in..

Reply to
gfretwell

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yeah that's exactly whei I thought, Damasta is only a small village, and there will be no pollution from the conversion station, while the Linoperamata power station is only 15 km from Iraklion, the city I live, with 180,000 inhabitants, running 6 steam units, 4 2-stroke diesels and numerous gas turbines. The 1st unit is 6 MW and built in 1966 and is still running! On a clear day from the mountains you can see the smog from the aforesaid power station hanging over Iraklion. The other one in Xylokamara, Chania is again near the city of Chania, but is running mainly a combined cycle gas turbine and some open cycle gas turbines so only diesel fuel. The newest one is in Atherinolakkos a desolate area and is running 2 60 MW 2-stroke-diesels and 2 60 MW steam units. About the cable-the other option would be AC, 400 kV, 3-phase but the capacitive losses would be colossal, over 500 km. The "valve hall" is going to be as large as one of our current power stations with transistors big as a room and totally inaccesible when running. There is going to be another valve hall near Athens and KYT Koymoyndoyroy (Center of Extra High Voltage-directly from the 400 kV rails I suppose). This is going to be a twin cable, with 1000 A current and as thick as 6 feet!With the insulation for 500 kV and shielding strong enough for the bottom of the Aegean Sea, as deep as 2500 meters-almost as high as Crete's highest peak, psiloritis.

Reply to
Dimitris Tzortzakakis

That is awesome. The spools those cables come on must be huge. This is a little project here but compared to that it is running an extension cord out to your work light in the barn

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Reply to
gfretwell

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